> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# Gravity: O2 Sensor (Calibrated) - I2C & UART

**Type:** Product page · **SKU:** SEN0465 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/gravity-o2-sensor-calibrated-i2c-uart.html ([markdown](https://core-electronics.com.au/gravity-o2-sensor-calibrated-i2c-uart.html.md))

The factory-calibrated oxygen sensor has a variety of signal output methods to meet various communication needs...

## Pricing

- **Price:** $149.95 (inc GST) — $136.32 AUD, exc GST
- **Quantity discounts:** 6+ $129.50 (exc GST) · 12+ $124.05 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 19 and Aug 24.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SEN0465:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/SEN0465:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

This is a sensor that detects oxygen concentration and supports three output modes: analog, I2C, and UART. **The probe has been calibrated at the factory, which can quickly and accurately measure the concentration of oxygen in the environment**. Can be widely applied to fields like portable devices, air quality monitoring devices, industries, mines, warehouses, and other spaces where the air is not easy to circulate.

The probe adopts the electrochemical principle, has the characteristics of strong anti-interference ability, high stability, high sensitivity, etc., and the service life is as long as two years. The sensor has 32 modifiable I2C addresses, an integrated temperature compensation algorithm, and a threshold alarm function, It has good compatibility with mainstream main control devices such as [Arduino](https://core-electronics.com.au/arduino.html), [ESP32](https://core-electronics.com.au/development-boards.html#category_2184), and [Raspberry Pi.](https://core-electronics.com.au/raspberry-pi.html) The easy-to-use Gravity interface, coupled with our sample code, can quickly build an oxygen concentration detector.

DFRobot has introduced 12 gas detection sensors in this series, [CO](https://core-electronics.com.au/gravity-co-sensor-calibrated-i2c-uart.html), [O2](https://core-electronics.com.au/gravity-o2-sensor-calibrated-i2c-uart.html), [NH3](https://core-electronics.com.au/gravity-nh3-sensor-calibrated-i2c-uart.html), [H2S](https://core-electronics.com.au/gravity-h2s-sensor-calibrated-i2c-uart.html), [NO2](https://core-electronics.com.au/gravity-no2-sensor-calibrated-i2c-uart.html), [HCL](https://core-electronics.com.au/gravity-hcl-sensor-calibrated-i2c-uart.html), [H2](https://core-electronics.com.au/gravity-h2-sensor-calibrated-i2c-uart.html), [PH3](https://core-electronics.com.au/gravity-ph3-sensor-calibrated-i2c-uart.html), [SO2](https://core-electronics.com.au/gravity-so2-sensor-calibrated-i2c-uart.html), [O3](https://core-electronics.com.au/gravity-o3-sensor-calibrated-i2c-uart.html), [CL2](https://core-electronics.com.au/gravity-cl2-sensor-calibrated-i2c-uart.html), [HF](https://core-electronics.com.au/gravity-hf-sensor-calibrated-i2c-uart.html), which are used in exactly the same way and data format, so you can combine them according to your needs.

![Gravity: O2 Sensor (Calibrated) - I2C&UART](https://core-electronics.com.au/attachments/localcontent/1(2)_18296768145.png)

 **Features**

- Strong anti-interference ability
- High stability
- High sensitivity
 
 **Applications**

- Air quality monitoring device
- Mining air detection
- Environmental protection
 
 **Specification**

- Detection Gas: Oxygen (O2)
- Detection range: 0~25%Vol
- Working Voltage: 3.3~5.5V DC
- Working Current: <5mA
- Output Signal: I2C, UART (0~3V), analog voltage
- Working Temperature: -20°C ~ 50°C
- Working Humidity: 15~90%RH (non-condensing)
- Storage Temperature: -20V°C ~ 50°C
- Storage Humidity: 15~90%RH (non-condensing)
- Lifespan: >2 years (in the air)
- Adapter Plate Size: 37\*32mm
- Compatibility: Arduino, ESP32, Raspberry pi
 
 **Documents**

- [Product wiki](https://wiki.dfrobot.com/SKU_SEN0465toSEN0476_Gravity_Gas_Sensor_Calibrated_I2C_UART)
 
 **Parts List**

- Gravity: O2 Signal Conversion Board x1
- O2 sensor probe x1
- Gravity - 4pin Cable x1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/image_12772.jpg)